Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 2106
interventional 1449
Observational 620
Registry 37

Studies over Time by Start Date

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug|placebo 428
Drug 325
Other 188
Device 140
Behavioral 127
Procedure 75
Diagnostic Test 16
Biological 14
Device|Drug 14
Device|Other 12
Device|Drug|placebo 11
Behavioral|Other 9
Dietary Supplement 9
Dietary Supplement|placebo 9
Biological|placebo 8
Device|Procedure 6
Other|placebo 6
Drug|Other 5
Behavioral|Drug 4
Drug|Radiation 4
Biological|Drug 3
Drug|Procedure 3
Other|Procedure 3
Radiation 3
Combination Product 2
Device|placebo 2
Dietary Supplement|Drug 2
Drug|Other|placebo 2
Behavioral|Biological|Diagnostic Test 1
Behavioral|Device 1
Behavioral|Device|Procedure 1
Behavioral|Dietary Supplement|placebo 1
Behavioral|Drug|placebo 1
Behavioral|Procedure 1
Combination Product|Drug|placebo 1
Combination Product|placebo 1
Device|Diagnostic Test 1
Device|Drug|Other 1
Device|Drug|Procedure 1
Device|Other|Radiation 1
Diagnostic Test|Procedure 1
Dietary Supplement|Other 1
Drug|Genetic|Procedure 1
Drug|Other|Procedure 1
Drug|placebo|Procedure 1
Drug|placebo|Radiation 1
placebo 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Yearly studies for each intervention by start date

Studies by Country

Country Study_Count
United States 345
NA 121
United Kingdom 79
Germany 71
Canada 68
China 45
France 44
Brazil 31
Spain 27
Netherlands 26
Belgium 23
Italy 22
Denmark 21
Japan 19
Norway 18
Switzerland 17
Turkey 15
United States|Canada 13
Australia 11
Kyrgyzstan 10
Sweden 10
Israel 9
Taiwan 9
India 8
Poland 8
Austria 7
Egypt 7
Korea, Republic of 6
Thailand 6
Hong Kong 5
Portugal 5
Tunisia 5
United States|Germany 4
United States|Puerto Rico 4
Greece 3
Ireland 3
Netherlands|United Kingdom 3
New Zealand 3
Singapore 3
United States|Australia|Canada|New Zealand 3
United States|Australia|New Zealand 3
Argentina 2
Australia|New Zealand 2
Bangladesh 2
Belgium|Netherlands 2
Colombia 2
Germany|Spain|United Kingdom 2
Germany|Switzerland 2
Hungary 2
Indonesia 2
Japan| 2
Pakistan 2
Russian Federation 2
Saudi Arabia 2
Slovenia 2
Sweden|United Kingdom 2
United States|Argentina|Belgium|Canada|Chile|China|France|Germany|Italy|Japan|Korea, Republic of|Poland|Russian Federation|Spain|United Kingdom 2
United States|United Kingdom 2
Andorra|Austria|Belgium|Bulgaria|Czech Republic|Denmark|France|Germany|Hungary|Italy|Netherlands|Poland|Romania|Russian Federation|Spain|United Kingdom 1
Argentina|Australia|Belgium|Brazil|Denmark|Germany|India|Philippines|United Kingdom 1
Argentina|Australia|Canada|Chile|Czechia|France|Greece|Hungary|Korea, Republic of|Netherlands|Russian Federation|South Africa|United Kingdom 1
Argentina|Australia|France|Germany|Italy|Japan|Korea, Republic of|Mexico|Poland|Romania|Russian Federation|Spain 1
Argentina|Australia|Germany|India|United Kingdom| 1
Argentina|Brazil|Bulgaria|Chile|Germany|Korea, Republic of|Slovakia|Spain 1
Argentina|Brazil|Canada|Croatia|Czech Republic|Denmark|Finland|Germany|Hong Kong|India|Italy|Korea, Republic of|Malaysia|Norway|Philippines|South Africa|Spain|Sweden|Thailand|Ukraine 1
Argentina|Brazil|Canada|Czech Republic|Denmark|Finland|Germany|Hong Kong|India|Italy|Korea, Republic of|Malaysia|Norway|Philippines|Romania|Russian Federation|South Africa|Spain|Sweden|Thailand 1
Argentina|Chile|China|Taiwan 1
Argentina|Chile|Colombia|Czech Republic|Denmark|Ecuador|Egypt|Estonia|France|Germany|Hungary|Israel|Italy|Korea, Republic of|Latvia|Lithuania|Netherlands|Peru|Romania|Russian Federation|Slovakia|Spain|Switzerland|Turkey|United Kingdom 1
Argentina|Chile|Czechia|Germany|Hungary|Norway|Romania|Russian Federation|Spain|Sweden 1
Argentina|Chile|New Zealand|South Africa 1
Argentina|Colombia|Croatia|Estonia|Hungary|India|Israel|Korea, Republic of|Latvia|Mexico|Panama|Poland|Russian Federation|Serbia|Slovenia|Turkey|United Kingdom 1
Argentina|Colombia|Italy|Malaysia|Mexico|Netherlands|Spain|Switzerland|United Kingdom 1
Argentina|France|Germany|Italy|Norway|Russian Federation|Ukraine 1
Argentina|Mexico|Russian Federation|Ukraine 1
Australia|Austria|Belgium|Brazil|Canada|Denmark|France|Germany|Greece|Hungary|Israel|Italy|Korea, Republic of|Netherlands|Poland|Russian Federation|Slovakia|South Africa|Spain|Turkey|United Kingdom 1
Australia|Austria|Canada|France|Germany 1
Australia|Austria|Canada|France|Hungary|Italy|Netherlands|Poland|Portugal|Russian Federation|South Africa|Spain|Switzerland|United Kingdom 1
Australia|Belgium|Brazil|Bulgaria|China|Denmark|France|Germany|Greece|Hungary|Italy|Netherlands|New Zealand|Philippines|Poland|Russian Federation|South Africa|Spain|Taiwan|Tunisia|Turkey|Ukraine|United Kingdom 1
Australia|Belgium|Canada|Czechia|Denmark|Germany|Greece|Ireland|Israel|Italy|Poland|Portugal|Spain|United Kingdom 1
Australia|Belgium|Canada|France|Germany|Italy|Spain|Turkey 1
Australia|Bulgaria|Germany|Netherlands|New Zealand|Romania 1
Australia|Canada 1
Australia|Canada|Denmark|France|Ireland|Netherlands|New Zealand|United Kingdom 1
Australia|Chile|New Zealand 1
Australia|China|India 1
Australia|China|Korea, Republic of|New Zealand|Taiwan 1
Australia|Czech Republic|Poland|Russian Federation 1
Australia|Germany|Netherlands|New Zealand|Poland|South Africa|Spain 1
Austria|Belgium|Bulgaria|Croatia|Czech Republic|Denmark|Finland|France|Germany|Hungary|Italy|Korea, Republic of|Netherlands|Poland|Romania|Russian Federation|Slovakia|South Africa|Spain|Sweden|Ukraine|United Kingdom 1
Austria|Belgium|Canada|France|Germany|Italy|Netherlands|South Africa|Spain|United Kingdom 1
Austria|Belgium|Canada|Germany|Russian Federation 1
Austria|Belgium|Czech Republic|Denmark|Estonia|Germany|Greece|Italy|Latvia|Lithuania|Netherlands|Norway|Romania|Russian Federation|Slovakia|Slovenia|Spain|Sweden|Ukraine|United Kingdom| 1
Austria|Belgium|Denmark|France|Germany|Netherlands|South Africa|Sweden 1
Austria|Belgium|France|Germany|Netherlands|United Kingdom 1
Austria|Bulgaria|Canada|Czech Republic|France|Germany|Hungary|Italy|Lithuania|Netherlands|Poland|South Africa|Spain|United Kingdom 1
Austria|Denmark|Finland|France|Slovenia 1
Austria|Denmark|Netherlands|Norway|Sweden 1
Austria|France 1
Austria|France|Germany|Hungary|Italy|Spain|United Kingdom 1
Austria|France|Germany|Israel 1
Belgium|Bulgaria|Greece|Hungary|Ireland|Russian Federation|Slovakia|Spain|Turkey|United Kingdom 1
Belgium|Canada|Chile|Germany 1
Belgium|Canada|Germany|Netherlands 1
Belgium|Canada|Germany|Spain|United Kingdom 1
Belgium|Czech Republic|Denmark|Germany|Hungary|Netherlands|Spain|Sweden 1
Belgium|Czech Republic|Estonia|Germany|Hungary|Korea, Republic of|Lithuania|Norway|Spain 1
Belgium|Denmark|Finland|Germany|Netherlands 1
Belgium|Denmark|Germany|Hungary 1
Belgium|Denmark|Netherlands|Romania|Russian Federation 1
Belgium|Finland|France|Germany|Italy|Netherlands|Spain|Sweden|United Kingdom 1
Belgium|France|Germany|Italy|Philippines|Poland|Russian Federation|Spain|Ukraine 1
Belgium|France|Germany|Netherlands|Portugal|Spain 1
Belgium|France|Japan 1
Belgium|Germany 1
Belgium|Italy|Netherlands 1
Belgium|Sweden 1
Bulgaria 1
Bulgaria|China|Czechia|Estonia|Germany|Greece|Hungary|Italy|Korea, Republic of|Mexico|Poland|Romania|Russian Federation|Slovakia|Ukraine 1
Bulgaria|Czech Republic|Hungary|Poland|Romania|Slovakia 1
Bulgaria|Finland|Germany|Hungary|Slovakia 1
Bulgaria|Germany|Hungary|Korea, Republic of|Latvia|Lithuania|Macedonia, The Former Yugoslav Republic of|Poland|Romania|Russian Federation|Slovakia|South Africa|Spain|Ukraine|United Kingdom 1
Bulgaria|Germany|Hungary|Ukraine 1
Bulgaria|Germany|Poland|United Kingdom 1
Bulgaria|Japan|Romania|Russian Federation|Ukraine 1
Bulgaria|Romania|Russian Federation 1
Bulgaria|Slovakia 1
Canada|Colombia|Czech Republic|Denmark|Finland|France|Germany|Hungary|Iceland|India|Italy|Peru|Russian Federation|Slovakia|Taiwan 1
Canada|Croatia|Czech Republic|Estonia|France|Germany|Guatemala|India|Korea, Republic of|Latvia|Lithuania|Philippines|Poland|South Africa|Taiwan 1
Canada|Denmark 1
Canada|Denmark|Netherlands|Romania|Ukraine 1
Canada|France|Hungary|India|Korea, Republic of|Latvia|Lithuania|Romania|South Africa|United Kingdom 1
Canada|France|Ireland|Italy|Netherlands|Russian Federation 1
Canada|France|Portugal|Spain 1
Canada|Germany|Hungary|Spain 1
Canada|Germany|Netherlands|Sweden 1
Canada|Germany|Spain 1
Canada|Netherlands|Switzerland 1
Canada|United States|Australia|Germany|Japan|Korea, Republic of|Philippines|Poland|Russian Federation|Slovakia|Taiwan|Ukraine 1
Chile 1
China|Hong Kong|Indonesia|Korea, Republic of|Thailand 1
China|India|Korea, Republic of|Philippines 1
China|Japan|Korea, Republic of 1
China|Korea, Republic of 1
China|Korea, Republic of|Philippines|Taiwan 1
China|Korea, Republic of|Philippines|Taiwan|Thailand 1
China|Korea, Republic of|Taiwan 1
Colombia|United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Czechia|Denmark|Finland|France|Germany|Hong Kong|Israel|Japan|Korea, Republic of|Netherlands|New Zealand|Norway|Peru|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Singapore|South Africa|Spain|Sweden|Thailand|Turkey|Ukraine|United Kingdom|Vietnam 1
Czech Republic|France|Germany|Hungary|Italy|Peru|Poland|Russian Federation|South Africa|Spain|Ukraine 1
Czech Republic|Germany|Hungary|Poland 1
Czech Republic|Poland|United Kingdom 1
Czech Republic|Romania 1
Czechia|Germany|Greece|Netherlands 1
Denmark|Czechia|Germany|Hungary|Netherlands|Poland|Russian Federation|Spain 1
Denmark|Estonia|Finland|Italy|Lithuania|Slovakia|Spain|United Kingdom 1
Denmark|Finland|Germany|Netherlands|United Kingdom 1
Denmark|Finland|Netherlands|Norway 1
Denmark|Finland|Netherlands|Norway|Sweden 1
Denmark|Germany 1
Denmark|Germany|Poland|Sweden|United Kingdom 1
Denmark|Norway|Sweden 1
Estonia|Finland|Germany|Korea, Republic of|Latvia|Lithuania|Netherlands|New Zealand|Russian Federation|Slovenia|South Africa|United Kingdom 1
Estonia|Finland|Germany|Netherlands|Russian Federation|Slovakia 1
Finland 1
France|Germany|Italy|Spain 1
France|Italy 1
France|Italy|Spain|Tunisia 1
France|United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Czechia|Denmark|Finland|Germany|Greece|India|Israel|Italy|Japan|Malaysia|Mexico|Netherlands|Norway|Poland|Portugal|Spain|Sweden|Switzerland|Thailand|United Kingdom 1
Germany|Czech Republic|Hungary|Korea, Republic of|Malaysia|Poland|Russian Federation|Taiwan 1
Germany|Estonia 1
Germany|Greece|Italy|Netherlands|Spain|United Kingdom 1
Germany|Greece|United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Chile|China|Croatia|Czech Republic|Denmark|Estonia|Finland|France|Hong Kong|Hungary|Iceland|Italy|Latvia|Lithuania|Malaysia|Mexico|Netherlands|New Zealand|Norway|Pakistan|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Singapore|Slovakia|South Africa|Spain|Sweden|Taiwan|Thailand|Ukraine|United Kingdom| 1
Germany|Hungary|Italy 1
Germany|Italy|South Africa|Switzerland 1
Germany|Netherlands 1
Germany|Netherlands|United Kingdom 1
Germany|Poland 1
Germany|United States|Belgium|Canada|Denmark|Hungary|Netherlands 1
Germany|United States|Belgium|Hungary 1
Hong Kong|India|Japan|Korea, Republic of|Singapore|Taiwan 1
Hong Kong|Korea, Republic of|Malaysia|Philippines|Taiwan 1
Hungary|Belgium|Bulgaria|Finland|Germany|Israel|Poland|Romania|Russian Federation|Sweden 1
Iceland 1
India|Japan|Korea, Republic of|Philippines|Poland|Russian Federation|Taiwan|Ukraine|Vietnam 1
Iran, Islamic Republic of 1
Italy|Spain|Sweden 1
Japan|United States|Argentina|Czechia|Germany|Poland|Romania|Russian Federation|Ukraine 1
Korea, Republic of|United States|Australia|Canada|Japan|Netherlands|Romania|Russian Federation|Singapore|Spain|Turkey 1
Latvia|United States|Bulgaria|Czech Republic|Hungary|Lithuania|Philippines|Poland|Ukraine|United Kingdom 1
Malawi|Zimbabwe 1
Malaysia 1
Malaysia|Singapore 1
Malta 1
Mexico 1
Netherlands|South Africa 1
Netherlands|United States|Argentina|Australia|Canada|Chile|Estonia|Germany|Italy|Mexico|Peru|Philippines|South Africa|Sweden|United Kingdom 1
Netherlands|United States|Belgium|Canada|Czechia|Germany|Hungary|Poland|Romania|Russian Federation|United Kingdom 1
New Zealand|Thailand|United Kingdom 1
Norway|Sweden 1
Peru 1
Russian Federation|Finland|Germany|Netherlands|United Kingdom 1
Slovakia|Ukraine 1
South Africa 1
South Africa|Estonia|Germany|Netherlands|Romania|Russian Federation|Slovakia|Sweden|Ukraine 1
South Africa|United Kingdom 1
Spain|Australia|Canada|France|Germany|Hungary|Poland|Slovakia|Sweden 1
Spain|Australia|Czechia|Denmark|Finland|France|Greece|Hungary|Norway|Poland|Portugal|Russian Federation 1
Spain|France|Germany 1
Spain|Sweden 1
Spain|United States|Canada|Denmark|Germany|Poland|United Kingdom 1
United Kingdom|Belgium|Greece|Netherlands|Switzerland 1
United States|Andorra|Argentina|Brazil|Chile|France|Germany|Greece|Ireland|Israel|Italy|Mexico|South Africa|Spain|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Chile|Colombia|Croatia|Czechia|Denmark|Finland|France|Germany|Greece|Guatemala|Hong Kong|Hungary|India|Ireland|Italy|Japan|Korea, Republic of|Latvia|Lithuania|Malaysia|Mexico|Netherlands|New Zealand|Norway|Philippines|Poland|Portugal|Romania|Russian Federation|Serbia|Singapore|Slovakia|Slovenia|South Africa|Spain|Sweden|Switzerland|Taiwan|Thailand|Turkey|Ukraine|United Kingdom|Vietnam 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Czech Republic|Denmark|Finland|France|Germany|Greece|Hong Kong|Hungary|Netherlands|Ireland|Italy|Japan|Lithuania|Malaysia|Mexico|New Zealand|Norway|Philippines|Poland|Portugal|Russian Federation|Singapore|Slovakia|Slovenia|South Africa|Spain|Switzerland|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Canada|Chile|Germany|Italy|New Zealand 1
United States|Argentina|Australia|Austria|Brazil|Canada|Chile|Colombia|Czechia|Denmark|Germany|Hungary|Italy|Japan|Korea, Republic of|Netherlands|New Zealand|Philippines|Poland|Spain|Sweden|Turkey|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Canada|China|Croatia|Czechia|Denmark|France|Greece|Hungary|Israel|Italy|Korea, Republic of|Poland|Romania|Singapore|Spain|Sweden|Taiwan|Ukraine|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Canada|China|Croatia|Czechia|Denmark|France|Greece|Hungary|Israel|Italy|Korea, Republic of|Poland|Romania|Singapore|Spain|Taiwan|Ukraine|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Chile|Colombia|Croatia|Denmark|France|Israel|Mexico|New Zealand|Norway|Peru|Philippines|Poland|Serbia|Slovenia|Sweden|Taiwan|Thailand|Turkey|Ukraine|Vietnam 1
United States|Argentina|Australia|Bulgaria|Canada|Chile|Czech Republic|Hungary|India|New Zealand|Poland|Slovakia|South Africa|Sweden|United Kingdom 1
United States|Argentina|Australia|Bulgaria|Canada|China|Czech Republic|Denmark|Estonia|Finland|France|Germany|Guatemala|Hungary|India|Italy|Japan|Korea, Republic of|Mexico|Netherlands|New Zealand|Portugal|Russian Federation|Slovenia|Turkey 1
United States|Argentina|Australia|Canada|Chile|Denmark|Germany|Italy|Mexico|Netherlands|Peru|South Africa|Spain|Sweden|United Kingdom 1
United States|Argentina|Australia|Canada|Chile|Denmark|Germany|Japan|Korea, Republic of|Netherlands|Romania|Slovakia|Taiwan|Ukraine|United Kingdom 1
United States|Argentina|Australia|Canada|Chile|Germany|Korea, Republic of|Mexico|Romania|South Africa 1
United States|Argentina|Australia|Canada|Chile|Germany|Poland|Russian Federation|Turkey|Ukraine 1
United States|Argentina|Australia|Canada|France|Germany|Sweden|Italy|Mexico|Netherlands|South Africa|Spain 1
United States|Argentina|Australia|Canada|Mexico|New Zealand|South Africa 1
United States|Argentina|Australia|Colombia|Denmark|Germany|Guatemala|Mexico|Philippines|South Africa|Spain|Turkey 1
United States|Argentina|Austria|Canada|Colombia|Czech Republic|Hungary|Denmark|Estonia|Finland|France|Germany|Greece|India|Ireland|Israel|Italy|Mexico|Netherlands|Peru|Philippines|Poland|Puerto Rico|Russian Federation|Slovakia|South Africa|Spain|United Kingdom 1
United States|Argentina|Austria|Canada|Germany|Netherlands|Russian Federation|Sweden 1
United States|Argentina|Belgium|Canada|Czechia|Germany|Italy|Netherlands|Poland 1
United States|Argentina|Brazil|Chile|Costa Rica|Mexico 1
United States|Argentina|Bulgaria|Canada|Chile|China|Czechia|Denmark|Finland|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Mexico|Poland|Romania|Russian Federation|Slovakia|Spain|Sweden|Turkey|Ukraine 1
United States|Argentina|Bulgaria|Canada|Chile|Germany|Hungary|Korea, Republic of|Netherlands|Philippines|Romania|South Africa|Thailand|United Kingdom 1
United States|Argentina|Bulgaria|Canada|Czech Republic|Germany|Hungary|Japan|Poland|Slovakia|South Africa|Spain|Sweden|Taiwan 1
United States|Argentina|Bulgaria|Canada|Denmark|Hungary|Mexico|Poland|Russian Federation 1
United States|Argentina|Bulgaria|Canada|Germany|Hungary|Romania|Russian Federation|Spain 1
United States|Argentina|Bulgaria|Croatia|Czechia|Germany|Hungary|Poland|Slovakia|South Africa|Spain|Turkey 1
United States|Argentina|Canada|Australia|Austria|Belgium|Brazil|Bulgaria|China|Colombia|Croatia|Denmark|Finland|France|Georgia|Germany|Greece|Guatemala|Hungary|India|Ireland|Israel|Italy|Korea, Republic of|Latvia|Lithuania|Malaysia|Mexico|Netherlands|New Zealand|Norway|Panama|Peru|Philippines|Poland|Portugal|Puerto Rico|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Sweden|Switzerland|Taiwan|Thailand|Tunisia|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Canada|Chile|Colombia|Italy|Malaysia|Mexico|Peru|Philippines|Romania|Russian Federation|Serbia|Spain|Taiwan|Thailand|Ukraine 1
United States|Argentina|Canada|Chile|Denmark|Estonia|Germany|Korea, Republic of|Mexico|Peru|Philippines|Poland|Russian Federation|Slovakia 1
United States|Argentina|Canada|Chile|Denmark|France|Germany|Italy|Korea, Republic of|Romania|Russian Federation|South Africa|Ukraine 1
United States|Argentina|Canada|Chile|France|Germany|Hungary|Israel|Italy|Korea, Republic of|Mexico|Netherlands|New Zealand|Peru|Poland|Russian Federation 1
United States|Argentina|Canada|Chile|Romania 1
United States|Argentina|Canada|Colombia|Mexico|Peru 1
United States|Argentina|Canada|Finland|France|Germany|Hungary|Italy|Spain|United Kingdom 1
United States|Argentina|Canada|Germany|India|Italy|Korea, Republic of|Puerto Rico|Spain|Sweden|Taiwan|Turkey 1
United States|Argentina|Chile|Greece|Peru|Romania|Ukraine 1
United States|Argentina|Chile|Guatemala|Honduras|Romania 1
United States|Argentina|Chile|Netherlands|Peru|South Africa 1
United States|Argentina|Czechia|Estonia|Germany|Korea, Republic of|Norway|Ukraine 1
United States|Argentina|France|Greece|Korea, Republic of|New Zealand|Poland|Russian Federation|South Africa|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Germany|Russian Federation|Ukraine 1
United States|Argentina|Norway 1
United States|Australia|Austria|Belgium|Canada|Denmark|Germany|New Zealand|Poland|Portugal|United Kingdom 1
United States|Australia|Austria|Brazil|France|Germany|Hungary|New Zealand|Romania|Russian Federation|United Kingdom 1
United States|Australia|Austria|Canada|Finland|France|Greece|Ireland|Italy|Netherlands|New Zealand|Russian Federation|South Africa|Spain|United Kingdom 1
United States|Australia|Austria|Canada|Germany|Greece|New Zealand|Norway|Slovakia|South Africa|Sweden 1
United States|Australia|Belgium|Canada|Czechia|Estonia|France|Greece|Italy|Mexico|Norway|Peru|Poland|Russian Federation|Spain|Sweden 1
United States|Australia|Belgium|Canada|France|Germany|Greece|Netherlands|Norway|Russian Federation|Spain|Sweden|Turkey|United Kingdom 1
United States|Australia|Brazil|Canada|Colombia|Germany|Greece|Romania|Russian Federation|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Australia|Bulgaria|Canada|France|Germany|Guatemala|Hungary|Japan|Philippines|Poland|Russian Federation|Slovakia|South Africa|Spain|Switzerland|Taiwan|Turkey|United Kingdom 1
United States|Australia|Canada 1
United States|Australia|Canada|Germany|Korea, Republic of|Netherlands|Poland|Romania|Spain 1
United States|Australia|Canada|United Kingdom 1
United States|Australia|China|Germany|New Zealand|Taiwan 1
United States|Australia|New Zealand|Poland|Thailand 1
United States|Austria|Belgium|Brazil|Canada|China|Colombia|Croatia|Germany|Hungary|India|Ireland|Japan|Norway|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Sweden|Taiwan|Turkey|United Kingdom 1
United States|Austria|Belgium|Canada|Colombia|Denmark|Finland|France|Germany|Greece|Hungary|Israel|Italy|Mexico|Norway|Poland|Russian Federation|Slovakia|Spain|Switzerland|Turkey|United Kingdom 1
United States|Austria|Belgium|Netherlands|Switzerland|United Kingdom 1
United States|Austria|Canada|Czechia|Germany|Hungary|Italy|Japan|Korea, Republic of|Netherlands|Poland|Romania|Russian Federation|South Africa|Spain|Switzerland|United Kingdom 1
United States|Austria|Netherlands|United Kingdom 1
United States|Belgium|Argentina|Austria|Brazil|Canada|Chile|Denmark|Germany|Italy|Mexico|Norway|Peru|Puerto Rico|Russian Federation|South Africa|Spain|Sweden|United Kingdom 1
United States|Belgium|Canada|Czech Republic|Denmark|Finland|Germany|South Africa|Spain|United Kingdom 1
United States|Belgium|Canada|Czech Republic|Germany|Greece|Netherlands|Portugal|Ukraine|United Kingdom 1
United States|Belgium|Canada|Denmark|Italy|Spain 1
United States|Belgium|Canada|Germany 1
United States|Belgium|Canada|Germany|Netherlands 1
United States|Belgium|China|France|Germany|Hong Kong|Italy|Korea, Republic of|Netherlands|Singapore|Spain|Taiwan|United Kingdom 1
United States|Belgium|Denmark|Estonia|France|Germany|Hungary|Japan|Netherlands|Norway|Philippines|Slovakia|Sweden|Ukraine 1
United States|Belgium|Germany|Hungary|Netherlands|Poland|Spain 1
United States|Belgium|Netherlands 1
United States|Belgium|New Zealand 1
United States|Belgium|Spain 1
United States|Bulgaria|Argentina|Australia|Austria|Belarus|Belgium|Bosnia and Herzegovina|Canada|Chile|China|Colombia|Croatia|Czechia|France|Georgia|Germany|Greece|Hungary|India|Indonesia|Israel|Italy|Japan|Korea, Republic of|Latvia|Macedonia, The Former Yugoslav Republic of|Malaysia|Mexico|Netherlands|Philippines|Poland|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom|Vietnam 1
United States|Bulgaria|Canada|Chile|Czechia|Greece|Japan|Mexico|Poland|Russian Federation|South Africa|Spain|Thailand 1
United States|Bulgaria|Canada|France|Hungary|Russian Federation|Ukraine 1
United States|Bulgaria|Czechia|Germany|Hungary|Israel|Poland|Spain|Ukraine|United Kingdom 1
United States|Bulgaria|Czechia|Germany|Hungary|Italy|Latvia|Poland|Romania|Russian Federation 1
United States|Bulgaria|Estonia|Germany|Russian Federation|United Kingdom 1
United States|Bulgaria|Germany|Hungary|Romania|Russian Federation|Ukraine 1
United States|Bulgaria|Germany|Japan|Korea, Republic of|Poland|Romania|Russian Federation|South Africa|Taiwan|Ukraine 1
United States|Canada|Colombia|Czech Republic|Hungary|India|Netherlands|Slovakia|Spain 1
United States|Canada|Czechia|Denmark|South Africa|Ukraine|United Kingdom 1
United States|Canada|Czechia|Germany|Hungary|Korea, Republic of|Poland|Russian Federation 1
United States|Canada|Czechia|Germany|Poland|Romania 1
United States|Canada|Denmark|France|Germany|Israel|Korea, Republic of|Netherlands|Spain|United Kingdom 1
United States|Canada|Denmark|France|Germany|Netherlands|Romania|United Kingdom 1
United States|Canada|Denmark|Germany|United Kingdom 1
United States|Canada|France|Germany|Israel|Italy|Korea, Republic of|Netherlands|Sweden|Switzerland|United Kingdom 1
United States|Canada|France|Germany|Poland|South Africa 1
United States|Canada|France|Poland|South Africa|Spain|United Kingdom 1
United States|Canada|Germany 1
United States|Canada|Germany|Hungary|Korea, Republic of|Mexico|Poland|Russian Federation|Spain|Taiwan 1
United States|Canada|Germany|India|Italy|Poland|South Africa|Spain 1
United States|Canada|Germany|Netherlands|Spain 1
United States|Canada|Italy 1
United States|Chile|Estonia|Germany|Japan|Korea, Republic of|Mexico|Philippines|Poland|Russian Federation 1
United States|Chile|Estonia|Russian Federation 1
United States|Chile|Mexico|Norway|Romania|Russian Federation|South Africa 1
United States|Chile|Romania|Russian Federation|Slovakia|South Africa 1
United States|China|Germany|Taiwan 1
United States|Czech Republic|Germany|Hungary|India|Slovakia|Spain|Turkey 1
United States|Czech Republic|Germany|Korea, Republic of 1
United States|Czech Republic|Germany|Poland|Romania|South Africa 1
United States|Czechia|Germany 1
United States|Czechia|Germany|Netherlands 1
United States|Czechia|Germany|Poland|Romania|Russian Federation 1
United States|Czechia|Hungary|Russian Federation 1
United States|Finland|Greece|Italy|Portugal|Sweden|Turkey|United Kingdom 1
United States|Finland|Israel|Italy|Japan|Korea, Republic of|Portugal|Spain|Sweden|United Kingdom 1
United States|France|Germany|Italy|Mexico|Peru|Poland|Romania|Russian Federation|Ukraine 1
United States|France|Germany|Netherlands|Spain|Turkey 1
United States|Germany|Italy|Romania|United Kingdom 1
United States|Germany|Italy|South Africa|Spain|Ukraine 1
United States|Germany|Japan 1
United States|Germany|Korea, Republic of|Norway|Philippines|Thailand 1
United States|Germany|Netherlands|Norway 1
United States|Germany|Romania|Russian Federation|Ukraine 1
United States|Germany|South Africa 1
United States|Germany|Spain|United Kingdom 1
United States|Honduras 1
United States|Netherlands|United Kingdom 1
United States|Poland|Russian Federation 1

Sites per Study

Site_count Study_Count
1 819
2 99
3 30
4 27
5 29
6 25
7 10
8 14
9 11
10 12
11 10
12 8
13 8
14 13
15 7
16 4
17 9
18 7
19 10
20 12
21 6
22 4
23 3
24 4
25 3
26 5
27 9
28 3
29 6
30 3
31 6
32 6
33 3
34 4
35 5
36 2
37 6
38 1
39 4
40 6
41 2
42 2
43 5
44 3
45 5
46 1
47 1
48 2
49 4
50 4
51 4
52 3
53 5
54 7
55 3
56 2
57 3
58 1
59 2
60 5
61 1
62 2
64 2
65 1
66 3
67 1
68 1
69 1
70 1
71 1
72 3
73 2
74 1
75 1
76 1
77 1
78 3
79 1
80 1
81 1
83 2
86 1
88 1
90 2
91 1
92 1
93 3
94 4
96 1
97 4
98 1
99 1
100 2
103 2
105 1
106 2
107 1
110 1
112 2
113 1
115 1
116 2
118 1
119 1
120 3
126 2
127 1
130 2
132 3
134 1
137 1
138 1
139 1
140 1
143 1
144 1
149 1
153 1
157 1
160 2
163 1
165 1
166 2
170 1
176 1
177 1
178 2
179 1
180 2
183 2
188 1
197 1
208 1
212 1
213 1
222 2
238 1
239 1
240 1
247 1
248 1
260 1
270 1
282 1
287 1
338 1
345 2
356 1
409 1
459 1
490 1
818 1
999 1
1191 1
1621 1

Phase

Phase Study_Count
N/A 546
Phase 3 337
Phase 2 235
Phase 4 192
Phase 1 79
Phase 2/Phase 3 25
Phase 1/Phase 2 23
Early Phase 1 12

Number of Arms

Number_of_Arms Count_of_Studies
1 198
2 787
3 143
4 80
5 44
6 25
7 7
8 10
9 3
10 2
12 3
16 1
NA 146

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 5.00000 3.00 5.0000 6.00000 1.0000 20.00 14.0000 4.0000
1st Qu. 11.50000 28.75 15.0000 24.00000 38.5000 51.00 150.0000 48.7500
Median 20.00000 60.00 25.0000 35.00000 74.0000 120.00 429.0000 125.0000
Mean 78.41667 187134.42 39.4359 70.95652 157.4217 263.44 809.3448 286.0573
3rd Qu. 58.00000 127.75 45.7500 70.50000 185.5000 243.00 905.5000 279.2500
Max. 341.00000 99999999.00 198.0000 527.00000 2080.0000 2059.00 17183.0000 2696.0000

Trial Group Type

group_type Group_Count
Experimental 1666
Active Comparator 654
Placebo Comparator 445
No Intervention 162
Other 160
NA 146
Sham Comparator 32

Intervention Model

intervention_model Study_Count
Parallel Assignment 882
Crossover Assignment 287
Single Group Assignment 229
NA 32
Factorial Assignment 13
Sequential Assignment 6

Primary Purpose

primary_purpose Study_Count
Treatment 1007
Supportive Care 99
Prevention 79
Diagnostic 72
Basic Science 59
Other 59
Health Services Research 34
NA 28
Screening 7
Device Feasibility 3
Educational/Counseling/Training 2

Observational Studies

Studies by Country

Country Study_Count
NA 198
United States 121
Germany 36
France 28
United Kingdom 26
Canada 19
China 18
Belgium 10
Italy 10
Spain 10
Korea, Republic of 9
Sweden 9
Japan 8
Norway 8
Switzerland 8
Taiwan 8
Netherlands 7
Brazil 6
Greece 6
Israel 6
Turkey 6
Denmark 5
Ireland 4
Singapore 4
Austria 3
United States|Canada 3
Costa Rica 2
Egypt 2
Hong Kong 2
Qatar 2
Russian Federation 2
Argentina|Bangladesh|Brazil|Canada|Chile|China|Colombia|India|Iran, Islamic Republic of|Kazakhstan|Kyrgyzstan|Malaysia|Pakistan|Palestinian Territory, occupied|Peru|Philippines|Poland|Russian Federation|Saudi Arabia|South Africa|Sweden|Tanzania|Turkey|United Arab Emirates|Zimbabwe 1
Argentina|Colombia|Uruguay|Venezuela 1
Australia 1
Australia|China|Korea, Republic of|Taiwan 1
Australia|Germany 1
Australia|New Zealand|United Kingdom 1
Austria|Belgium|Denmark|Finland|France|Germany|Greece|Ireland|Italy|Netherlands|Norway|Portugal|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Austria|Czechia|Hungary|Israel|Romania|Russian Federation|Slovakia|Slovenia|Switzerland 1
Austria|Germany 1
Belgium|Denmark|Finland|Germany|Netherlands|Norway 1
Belgium|France|Germany|Netherlands|Poland|Spain 1
Belgium|Greece|Netherlands|United Kingdom 1
Bulgaria 1
Canada|France 1
Croatia 1
Czechia 1
Denmark|France|Germany 1
Egypt|Germany|India|Sri Lanka 1
Germany|India|Sri Lanka 1
Hungary|Slovakia|Slovenia 1
India 1
Italy|Croatia|Denmark|Ireland|Netherlands|Norway|Portugal|Spain|Sweden|United Kingdom 1
Kazakhstan 1
Kyrgyzstan 1
Netherlands|United Kingdom 1
Romania|Bulgaria|Czechia|Hungary|Israel|Lithuania|Poland|Russian Federation|Slovenia|Switzerland|Ukraine 1
Thailand 1
United States|Argentina|Australia|Brazil|Canada|China|Colombia|Denmark|France|Germany|Italy|Japan|Korea, Republic of|Mexico|Netherlands|Norway|Spain|Sweden|United Kingdom 1
United States|Australia 1
United States|Belgium|Canada|Denmark|Finland|Germany|Japan|Korea, Republic of|Poland|Spain|Sweden|United Kingdom 1
United States|Bulgaria|Canada|Czech Republic|Denmark|Netherlands|New Zealand|Norway|Slovenia|Spain|Ukraine|United Kingdom 1
United States|Bulgaria|Canada|Czech Republic|France|Germany|Italy|Russian Federation|Sweden 1
United States|Germany|Italy 1
United States|Puerto Rico 1

Sites per Study

Site_count Study_Count
1 502
2 32
3 9
4 8
5 5
6 3
7 1
8 4
9 3
10 2
12 1
13 1
14 1
15 3
16 2
17 1
18 1
19 4
20 4
21 1
22 1
23 1
26 3
32 1
34 1
40 1
41 1
42 1
44 1
47 2
51 1
57 1
60 1
79 1
90 1
108 1
123 1
141 1
169 1
177 1
185 1
188 1
233 1
301 1
352 1
388 1
418 1
605 1
606 1

Enrollment Metrics

Measure Observational
Min 1.00
1st Qu 75.75
Median 211.00
Mean 418803.68
3rd Qu 893.25
Max 99999999.00

Observation Model

observational_model Study_Count
Cohort 295
NA 151
Case-Only 57
Case-Control 36
Other 31
Case Control 30
Family-Based 6
Case-Crossover 5
Natural History 4
Defined Population, Natural History 3
Ecologic or Community 2

Time Perspective

time_perspective Study_Count
Prospective 327
NA 131
Cross-Sectional 77
Retrospective 72
Other 8
Cross-Sectional, Prospective 2
Longitudinal 1
Longitudinal, Prospective 1
Longitudinal, Retrospective 1

Registries

Studies by Country

Country Study_Count
United States 7
China 3
Germany 3
Korea, Republic of 3
Brazil 2
Turkey 2
United Kingdom 2
Austria 1
Austria|Bulgaria|Croatia|Czech Republic|Hungary|Latvia|Poland|Russian Federation|Serbia|Slovakia|Slovenia 1
Austria|France|Germany|Italy|United Kingdom 1
Belgium 1
Canada 1
Finland 1
France 1
France|Germany|Italy|Turkey|United Kingdom 1
NA 1
Netherlands 1
Poland 1
Russian Federation 1
Taiwan 1
Tunisia 1
United States|Puerto Rico 1

Sites per Study

Site_count Study_Count
1 28
3 2
4 1
5 1
7 1
42 1
47 1
81 1
180 1

Enrollment Metrics

Measure Registries
Min 20.000
1st Qu 100.000
Median 500.000
Mean 3012.459
3rd Qu 2000.000
Max 75000.000

Registry Model

observational_model Study_Count
Cohort 26
Case-Only 5
Other 4
Case-Control 2

Time Perspective

time_perspective Study_Count
Prospective 27
Cross-Sectional 5
Other 5

Follow-up

target_duration Study_Count
1 Day 6
1 Year 5
10 Years 5
5 Years 5
1 Month 2
12 Months 2
15 Years 2
3 Years 2
4 Years 2
2 Days 1
4 Weeks 1
6 Months 1
60 Months 1
7 Months 1
8 Years 1

Overview of Studies

Interventional Trials

#If less then 500 trials

Observational Studiess

#If less then 500 studies

Registries

#If less then 500 registries

nct_id brief_title link overall_status source primary_completion_date
NCT03755505 The Microbiome of Sputum, Urine and Feces in Healthy Persons and Chronic Obstructive Pulmonary Disease (COPD) Patients https://ClinicalTrials.gov/show/NCT03755505 Recruiting Asan Medical Center 2019-03-31
NCT03297775 Rheumatoid Arthritis Patients at Risk for Interstitial Lung Disease https://ClinicalTrials.gov/show/NCT03297775 Recruiting University of Colorado, Denver 2027-06-30
NCT03192267 Early Rheumatoid Arthritis Lung Disease Study https://ClinicalTrials.gov/show/NCT03192267 Recruiting University of Nebraska 2026-10-31
NCT03099525 Treatment Outcome and Prognostic Factors for Rheumatoid Arthritis (RA) Patients With Interstitial Lung Disease (ILD) https://ClinicalTrials.gov/show/NCT03099525 Recruiting Hanyang University 2021-03-31
NCT03014609 Cardiovascular Risk and Chronic Obstructive Pulmonary Disease https://ClinicalTrials.gov/show/NCT03014609 Recruiting University Hospital, Grenoble 2020-11-30
NCT02951416 Clinical Course of Interstitial Lung Diseases: European IPF Registry and Biobank https://ClinicalTrials.gov/show/NCT02951416 Recruiting University of Giessen 2025-01-31
NCT02907788 Inflammatory Markers in Broncho-alveolar Lavage Fluid as Risk Factors for Lung Disease in Infants With Cystic Fibrosis: the I-BALL Study https://ClinicalTrials.gov/show/NCT02907788 Recruiting Erasmus Medical Center 2022-12-31
NCT02853383 Registry of COPD Patients From Outpatient Polyclinic Healthcare Institutions of the Russian Federation in Moscow https://ClinicalTrials.gov/show/NCT02853383 Recruiting Interregional Public Organization, Russian Respiratory Society 2019-01-31
NCT02852928 European Management Platform for Childhood Interstitial Lung Diseases - chILD-EU Register and Biobank https://ClinicalTrials.gov/show/NCT02852928 Recruiting Ludwig-Maximilians - University of Munich 2024-12-31
NCT02803242 COPD Patient-Powered Research Network https://ClinicalTrials.gov/show/NCT02803242 Recruiting COPD Foundation 2025-01-31
NCT02777957 Predictors of Pulmonary Hypertension in Patients With Advanced Lung Diseases https://ClinicalTrials.gov/show/NCT02777957 Active, not recruiting Silesian Centre for Heart Diseases 2020-04-30
NCT02758808 Pulmonary Fibrosis Foundation Patient Registry https://ClinicalTrials.gov/show/NCT02758808 Recruiting University of Michigan 2021-03-31
NCT02732444 Erythrocytes Membrane Stability in COPD Patients in Long-Term Home Oxygen Therapy https://ClinicalTrials.gov/show/NCT02732444 Completed Federal University of Uberlandia 2017-08-31
NCT03035097 Deployment-Related Lung Disease Research Database and Biorepository https://ClinicalTrials.gov/show/NCT03035097 Recruiting National Jewish Health 2025-12-31
NCT02552160 DETECT-Register DocumEnTation and Evaluation of a COPD Combination Therapy https://ClinicalTrials.gov/show/NCT02552160 Completed AstraZeneca 2017-12-31
NCT02527486 Seoul National University Airway Registry https://ClinicalTrials.gov/show/NCT02527486 Recruiting Seoul National University Hospital 2021-12-31
NCT02119494 Phenotypes of COPD in Central and Eastern Europe https://ClinicalTrials.gov/show/NCT02119494 Completed Masaryk University 2015-12-31
NCT02002351 Prospective Study on Rehabilitation Patients With Pulmonary Hypertension and Other Pulmonary Diseases https://ClinicalTrials.gov/show/NCT02002351 Completed Paracelsus Harz Clinic Bad Suderode. 2015-12-31
NCT01952002 Clinical Safety for the Inspiratory Muscle Training https://ClinicalTrials.gov/show/NCT01952002 Completed Clínica de Medicina do Exercício 2013-06-30
NCT01915511 Idiopathic Pulmonary Fibrosis and Interstitial Lung Disease Prospective Outcomes Registry https://ClinicalTrials.gov/show/NCT01915511 Recruiting Duke University 2025-01-31
NCT01794390 Handling Inhalers - Technique Error Comparison (HI-TEC) https://ClinicalTrials.gov/show/NCT01794390 Completed Research in Real-Life Ltd 2014-03-31
NCT04370158 Interstitial Lung Diseases Cohort Study in China https://ClinicalTrials.gov/show/NCT04370158 Recruiting China-Japan Friendship Hospital 2020-12-31
NCT04342078 Vitamin D and Health Outcomes in Preterm Born Population https://ClinicalTrials.gov/show/NCT04342078 Enrolling by invitation University of Oulu 2022-08-31
NCT04285047 Advancing the Patient Experience in Chronic Obstructive Pulmonary Disease (APEX COPD) https://ClinicalTrials.gov/show/NCT04285047 Enrolling by invitation Optimum Patient Care 2022-12-31
NCT04259736 Prospective Cohort Study of Molecular Mechanism of Lower Respiratory Tract Microbes in Patients With AECOPD https://ClinicalTrials.gov/show/NCT04259736 Recruiting Huashan Hospital 2020-12-31
NCT04180670 Prevalence of Urinary Incontinence and Evaluation of Related Factors in Patients With COPD https://ClinicalTrials.gov/show/NCT04180670 Recruiting Sanko University 2020-03-31
NCT04095351 Connective Tissue Diseases and Lung Manifestations https://ClinicalTrials.gov/show/NCT04095351 Recruiting Medical University Innsbruck 2021-03-01
NCT04050943 A Cohort of Patients With Chronic Pulmonary Disease https://ClinicalTrials.gov/show/NCT04050943 Recruiting The First Affiliated Hospital of Guangzhou Medical University 2021-09-01
NCT04016181 The Edinburgh Lung Fibrosis Molecular Endotyping (ELFMEN) Study https://ClinicalTrials.gov/show/NCT04016181 Enrolling by invitation University of Edinburgh 2022-03-31
NCT03995654 Research of Burden of Interstititial Lung Diseases in Turkey https://ClinicalTrials.gov/show/NCT03995654 Active, not recruiting Karadeniz Technical University 2020-07-01
NCT03853642 Blood Eosinophil Measurements in Patients With Chronic Obstructive Pulmonary Disease https://ClinicalTrials.gov/show/NCT03853642 Completed Universitair Ziekenhuis Brussel 2020-03-28
NCT03849040 The Use of Artificial Intelligence to Predict Cancerous Lymph Nodes for Lung Cancer Staging During Ultrasound Imaging https://ClinicalTrials.gov/show/NCT03849040 Completed St. Joseph’s Healthcare Hamilton 2019-09-23
NCT03747627 BPF Genetics of ILD Study https://ClinicalTrials.gov/show/NCT03747627 Recruiting NHS Forth Valley 2024-01-22
NCT03604952 Effects of Ramadan Observance in Male Patients With Chronic Obstructive Pulmonary Disease https://ClinicalTrials.gov/show/NCT03604952 Completed Faculty of Medicine, Sousse 2015-07-14
NCT02811588 Registry of Stable Hypercapnic Chronic Obstructive Pulmonary Disease Treated With Non-Invasive Ventilation https://ClinicalTrials.gov/show/NCT02811588 Completed ResMed 2017-12-31
NCT03540862 Negative Pressure Ventilator in Long-term Pulmonary Rehabilitation for Chronic Obstructive Pulmonary Disease https://ClinicalTrials.gov/show/NCT03540862 Recruiting Chang Gung Memorial Hospital 2020-12-30
NCT00014859 Epidemiology of Surfactant Protein-B Deficiency https://ClinicalTrials.gov/show/NCT00014859 Recruiting Washington University School of Medicine 2020-12-31